On the fist run, home assistant complained about the sanction package missing and would not restart. I then forced the restart by restarting the container and it was fine (home assisstant installed it).

I then ran into an authentication issue. In the app, my client id is just four digits, not six. It might be due to authenticating by e-mail and password? I inserted a _LOGGER.debug statement above the line and client_id and password are correct.

File "/config/custom_components/adax/climate.py", line 162, in _request self._oauth_client.request_token(grant_type='password', username=self._client_id, password=self._client_secret)
(...)
File "/usr/local/lib/python3.8/urllib/request.py", line 649, in http_error_default raise HTTPError(req.full_url, code, msg, hdrs, fp) urllib.error.HTTPError: HTTP Error 400: {"error": "invalid_request"}

Update
Got this if I put 00 in front of my user_id:
File "/usr/local/lib/python3.8/urllib/request.py", line 649, in http_error_default raise HTTPError(req.full_url, code, msg, hdrs, fp) urllib.error.HTTPError: HTTP Error 400: {"error": "invalid_grant"}

Upsate 2:
I see, now, that one has to add credentials in the new 3.5.1 app. However, it is still not available for android. Will retry when this is available

Log Details (ERROR)
Logger: homeassistant.components.hassio
Source: components/hassio/init.py:326
Integration: Hass.io (documentation, issues)
First occurred: 11:32:40 PM (1 occurrences)
Last logged: 11:32:40 PM

Platform error climate.adax - No module named 'sanction' Invalid config for [sensor]: required key not provided @ data['platform']. Got None. (See ?, line ?).